Liquid-jetting device

ABSTRACT

An ink jet recording apparatus includes a slide member slidably supported at a cartridge holder and a lock claw member rotatably supported at the cartridge holder. The slide member slides along an insertion direction of an ink cartridge with respect to the cartridge holder between a first slide position and a second slide position. When the slide member is located at the second slide position, the lock claw member is located at a first rotation position. At this time, the ink cartridge is incapable of being removed from the cartridge holder. When the slide member moves to the first slide position from the second slide position, the lock claw member is located at the second rotation position. At this time, the ink cartridge is removable from the cartridge holder.

FIELD OF THE INVENTION

The present invention relates to a liquid ejection apparatus forejecting liquid such as ink toward a target.

BACKGROUND OF THE INVENTION

A conventional ink jet recording apparatus as a liquid ejectionapparatus includes a carriage, a recording head loaded on the carriage,and an ink cartridge as a liquid cartridge for storing ink to besupplied to the recording head. In the ink jet recording apparatus,printing is performed for a recording medium by ejecting ink from anozzle provided at the recording head while relatively moving thecarriage and the recording medium.

Ink jet recording apparatuses include a so-called off carriage typewhich is the type without an ink cartridge loaded on a carriage in orderto reduce load on the carriage and to make the apparatus compact andthin. In the off carriage type ink jet recording apparatus, the inkcartridge usually includes an ink pack for housing ink and a case forhousing the ink pack. The ink inside the ink pack is supplied to therecording head by supplying air pressurized by a pressure pump into aspace between the ink pack and the case and crushing the ink pack, or bygravity by locating the ink cartridge above the carriage.

In the off carriage type ink jet recording apparatus, the ink cartridgeis detachably attached to a cartridge holder provided at the recordingapparatus. When the ink in the ink pack is used up, the old inkcartridge is removed from the cartridge holder, and a new ink cartridgeis attached to the cartridge holder.

There are proposed various ink jet recording apparatuses which areimproved to attach and detach the ink cartridge easily to and from thecartridge holder. For example, the ink jet recording apparatus disclosedin Japanese Laid-Open Patent Publication No. 2002-200749 includes acover member which is opened when the ink cartridge is operated to beattached and detached, and an operation lever rotatably provided insidethe cover member. The ink cartridge is attached and detached to and fromthe cartridge holder by rotating the operation lever.

In the recording apparatus disclosed in Japanese Laid-Open PatentPublication No. 2002-200749, fixation of the ink cartridge to thecartridge holder is mainly performed by means of the cover member.However, in the state in which the ink cartridge is attached to thecartridge holder, a gap occurs between the cover member and the inkcartridge. Therefore, the ink cartridge swings in the cartridge holderdue to vibrations and drop during transportation and printing. As aresult, there arises fear that an ink lead-in tube of the ink pack andan ink lead-out portion of the cartridge holder will become disconnectedand an air lead-out tube of the ink cartridge and an air lead-in portionof the cartridge holder will become disconnected. Incomplete connectionbetween the ink lead-in tube and the ink lead-out portion causes leakageof the ink, and incomplete connection between the air lead-out tube andthe air lead-in portion makes it difficult to supply the pressurized airto the ink cartridge with high accuracy.

Therefore, in order to suppress swing of the ink cartridge in thecartridge holder, the cartridge holder and the ink cartridge arerespectively provided with projections for positioning which are engagedwith each other. However, when the ink cartridge is removed from thecartridge holder, it is not necessarily easy for users unaccustomed toreplacement of the ink cartridges to pull the ink cartridge with strongforce to release engagement of the projections.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a liquid ejectionapparatus capable of easily and reliably attaching and detaching aliquid cartridge to and from a cartridge holder.

In order to achieve the above described object, the present inventionprovides the following liquid ejection apparatus. The liquid ejectionapparatus comprises a cartridge holder, a liquid cartridge which isdetachably attached to the cartridge holder and stores liquid, a slidemember and a rotating member. The liquid ejection apparatus ejectsliquid in the liquid cartridge attached to the cartridge holder toward atarget. The slide member is slidably supported at the cartridge holder.The slide member slides along an insertion direction of the liquidcartridge between a first position and a second position. The insertiondirection is a direction in which the liquid cartridge is inserted intothe cartridge holder when the liquid cartridge is attached to thecartridge holder. The rotating member is rotatably supported at thecartridge holder. Rotation of the rotating member is linked to slidingof the slide member. When the slide member moves to the second positionfrom the first position, the rotating member displaces so as not toallow removal of the liquid cartridge from the cartridge holder, andwhen the slide member moves to the first position from the secondposition, the rotating member displaces to allow removal of the liquidcartridge from the cartridge holder.

The present invention also provides the following liquid ejectionapparatus. The liquid ejection apparatus comprises a liquid ejectionhead for ejecting liquid toward a target, a liquid cartridge for storingthe liquid, a liquid passage for connecting the liquid ejection head andthe liquid cartridge, and a cartridge holder for housing the liquidcartridge. The cartridge holder comprises a slide member, a lock clawmember and a rib. The slide member is slidable along an insertiondirection of the liquid cartridge between a first slide position and asecond slide position. The insertion direction is a direction in whichthe liquid cartridge is inserted into the cartridge holder when theliquid cartridge is attached to the cartridge holder. The lock clawmember is supported at the slide member rotatably between a firstrotation position and a second rotation position. The rib abuts the lockclaw member. The rib makes the lock claw member to be located at thefirst rotation position when the slide member is located at the firstposition, and makes the lock claw member to be located at the secondrotation position when the slide member is located at the secondposition. The liquid cartridge comprises an engaging portion whichswitches between a state in which the engaging portion is engaged withthe lock claw member and a state in which the engaging portion is notengaged with the lock claw member, the engaging portion is not engagedwith the lock claw member when the lock claw member is located at thefirst rotation position, and is engaged with the lock claw member whenthe lock claw member is located at the second rotation position.

The present invention provides the following liquid ejection apparatus.The liquid ejection apparatus comprises a liquid ejection head forejecting liquid toward a target, a liquid cartridge for storing theliquid, a liquid passage for connecting the liquid ejection head and theliquid cartridge, and a cartridge holder for housing the liquidcartridge, a slide member and a rotating member. The slide member isslidably supported at the cartridge holder. The slide member slidesalong an insertion direction of the liquid cartridge between a firstposition and a second position. The insertion direction is a directionin which the liquid cartridge is inserted into the cartridge holder whenthe liquid cartridge is attached to the cartridge holder. The rotatingmember is rotatably supported at the cartridge holder. Rotation of therotating member is linked to sliding of the slide member. When the slidemember moves to the second position from the first position, therotating member displaces So as to connect the liquid cartridge to theslide member, and when the slide member moves to the first position fromthe second position, the rotating member displaces to release connectionof the liquid cartridge to the slide member.

The present invention also provides the following liquid ejectionapparatus. The liquid ejection apparatus comprises a liquid ejectionhead for ejecting liquid toward a target, a liquid cartridge for storingthe liquid, a liquid passage for connecting the liquid ejection head andthe liquid cartridge, a cartridge holder for housing the liquidcartridge, and a slide member slidably supported at the cartridgeholder. The slide member slides along an insertion direction of theliquid cartridge between a first slide position and a second slideposition following attachment and detachment of the liquid cartridge toand from the cartridge holder. The insertion direction is a direction inwhich the liquid cartridge is inserted into the cartridge holder whenthe liquid cartridge is attached to on the cartridge holder. The liquidpassage has a liquid supply needle that forms a connection portion tothe liquid cartridge. The cartridge holder has an air lead-in tubeconnected to the liquid cartridge. The slide member has a part whichguides the liquid supply needle and a part which guides a part of theair lead-in tube connected to the liquid cartridge.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an ink jet recording apparatusaccording to a first embodiment of the present invention;

FIG. 2 is an exploded perspective view of the recording apparatus inFIG. 1;

FIG. 3 is a sectional view of an ink cartridge in the recordingapparatus in FIG. 1;

FIG. 4 is a partial perspective view of a cartridge holder in therecording apparatus in FIG. 1;

FIG. 5 is a perspective view of a connecting member in the recordingapparatus in FIG. 1;

FIG. 6 is a perspective view of a slide member in the recordingapparatus in FIG. 1;

FIG. 7 is a schematic diagram of a latch groove in the recordingapparatus in FIG. 1;

FIG. 8 is a sectional view of the connecting member in the recordingapparatus in FIG. 1;

FIG. 9 is a partial plan view of a cartridge holder in the recordingapparatus in FIG. 1;

FIG. 10 is a view explaining an operation of the connecting member inthe recording apparatus in FIG. 1;

FIG. 11 is a view explaining an operation of the connecting member inthe recording apparatus in FIG. 1;

FIG. 12 is a perspective view showing an ink jet recording apparatusaccording to a second embodiment of the present invention;

FIG. 13 is an exploded perspective view of an essential part of therecording apparatus in FIG. 12;

FIG. 14 is a sectional view of an ink cartridge in the recordingapparatus in FIG. 12;

FIG. 15 is a partially perspective view of a cartridge holder in therecording apparatus in FIG. 12;

FIG. 16 is a perspective view of a connecting member in the recordingapparatus in FIG. 12;

FIG. 17 is a perspective view of a slide member in the recordingapparatus in FIG. 12;

FIG. 18 is a schematic diagram of a latch groove in the recordingapparatus in FIG. 12;

FIG. 19 is a sectional view of the connecting member in the recordingapparatus in FIG. 12;

FIG. 20 is a partial plan view of the cartridge holder in the recordingapparatus in FIG. 12;

FIG. 21 is a schematic diagram of a groove in the recording apparatus inFIG. 12;

FIG. 22 is a sectional view of the connecting member in the recordingapparatus in FIG. 12; and

FIG. 23 is a partial plan view of the cartridge holder in the recordingapparatus in FIG. 12.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, a first embodiment of the present invention will beexplained with reference to FIG. 1 to FIG. 11.

A liquid ejection apparatus according to this embodiment is an ink jetrecording apparatus 11 as shown in FIG. 1. As shown in FIG. 1, therecording apparatus 11 is housed in a body case 12. The body case 12 isa casing in a substantially rectangular parallelepiped shape, and acartridge holder 12 a is provided on a top surface of the body case 12.

A guide shaft 14, a carriage 15, a recording head 20 as a liquidejection head and a valve unit 21, which are shown in FIG. 2, and an inkcartridge 23 as a liquid cartridge and a pressure pump 25, which areshown in FIG. 1, are disposed in the body case 12.

As shown in FIG. 2, the guide shaft 14 is formed into a rod-shape, andis laid between frames 12 b in the body case 12. The carriage 15 isdriven by and connected to a carriage motor (not shown) supported at thebody case 12 via a timing belt (not shown). The carriage 15 is supportedon the guide shaft 14 so as to reciprocally move on the guide shaft 14along an axial direction of the guide shaft 14, following the drive ofthe carriage motor. Hereinafter, the movement direction of the carriage15, namely, the axial direction of the guide shaft 14 is also called amain scanning direction.

The recording head 20 is provided at an undersurface of the carriage 15,and includes a plurality of nozzles (not shown), which eject ink asliquid. The valve unit 21, which is loaded on the carriage 15,temporarily stores ink taken in from the ink cartridge 23, and adjuststhe stored ink at predetermined pressure and supplies the ink to therecording head 20.

The number of valve units 21 included by the recording apparatus 11shown in FIG. 1 is three, and each valve unit 21 can adjust two kinds ofink at predetermined pressure and supply them individually to therecording head 20. Each of three valve units 21 is assigned with two ofsix kinds of ink of black, yellow, magenta, cyan, light magenta andlight cyan.

A recording medium P as a target is fed below the recording head 20along a direction (auxiliary scanning direction) perpendicular to themain scanning direction by feeding means (not shown). The recordingmedium P that is fed out is supported by a platen (not shown) providedbetween the frames 12 b.

As shown in FIG. 1, the number of ink cartridges 23 included by therecording apparatus 11 is six, and each ink cartridge 23 stores one ofsix kinds of ink: black, yellow, magenta, cyan, light magenta and lightcyan. The ink cartridge 23 is detachably attached to the cartridgeholder 12 a. As shown in FIG. 3, the ink cartridge 23 includes an inkcase 31 as a liquid case and an ink pack 32 as a liquid housing part.The ink cartridge 23 shown in FIG. 3 is one of six ink cartridges 23,and the remaining five ink cartridges 23 have the same structures. Theink case 31 is formed of resin into a substantially rectangularparallelepiped shape. The ink pack 32 is formed by overlaying twoflexible sheets on each other. Ink as liquid is sealed inside the inkpack 32.

The ink pack 32 has an ink discharge port 32 a. A part of the inkdischarge port 32 a is exposed to the outside of the ink case 31, andthe other part of the ink pack 32 is housed inside the ink case 31 in anairtight state. In the ink case 31, a gap 33 is provided between the inkcase 31 and the ink pack 32.

The ink case 31 is provided with a communication hole, not shown, whichallows the outside of the ink case 31 and the gap 33 to communicate witheach other. When air is taken into the gap 33 via the communicationhole, the ink pack 32 is crushed and ink inside the ink pack 32 isdischarged through the ink discharge port. The ink discharge port 32 ais connected to the above described valve unit 21 via an ink supply tube35 shown in FIG. 2 as a liquid passage that is provided to correspond toeach of the ink cartridges. The ink discharged from the ink pack 32 issupplied to the valve unit 21 via the ink supply tube 35.

As shown in FIG. 1, the pressure pump 25 is fixed to a rear part of thebody case 12. The pressure pump 25 is connected to the above describedcommunication hole of each of the ink cartridges 23 via an air supplytube (not shown). The pressure pump 25 sucks atmospheric air,pressurizes the sucked air, and introduces the air into the abovedescribed gap 33 of the ink cartridge 23 via an air supply tube.

The ink inside the ink pack 32 of the ink cartridge 23 is supplied tothe valve unit 21 and as a result the ink pack 32 is crushed by thepressurized air supplied from the pressure pump 25. The ink supplied tothe valve unit 21 is adjusted to predetermined pressure and thensupplied to the recording head 20, and ejected toward the recordingmedium P, which is fed from the above described feeding means. When theink is ejected from the recording head 20, the recording apparatus 11moves the carriage 15 along the main scanning direction and at the sametime, moves the recording medium P along the direction (auxiliaryscanning direction) perpendicular to the main scanning direction, basedon the data (image data) concerning printing to be performed on therecording medium P.

Next, the above described cartridge holder 12 a will be explained indetail.

As shown in FIG. 1 and FIG. 4, the cartridge holder 12 a includes sixhousing chambers 39 capable of housing the ink cartridges 23 placed in ahorizontal state. When the ink cartridge 23 is housed in the housingchamber 39, the ink cartridge 23 is slid in the direction shown by thearrow L in FIG. 4. Namely, the arrow L direction is the insertiondirection in which the ink cartridge 23 is inserted into the cartridgeholder 12 a when the ink cartridge 23 is attached to the cartridgeholder 12 a.

As shown in FIG. 4, a rail member 40 is provided in the vicinity of thecenter of a bottom surface of the housing chamber 39. The rail member 40includes a plate part 40 a in a substantially rectangular shape, and apair of engaging pieces 40 b and 40 c provided at both sides of theplate part 40 a. The plate part 40 a is fixed in the state in which itclosely contacts the bottom surface of the housing chamber 39. Theengaging pieces 40 b and 40 c extend along the arrow L direction. A gapis provided between the engaging pieces 40 b and 40 c, and the bottomsurface of the housing chamber 39.

An ink supply needle 41 as a liquid supply needle and an airintroduction tube 42 as an air lead-in tube protrude from a wall surface39 a located at the innermost part of each of the housing chambers 39.The ink supply needle 41 is hollow, and is connected to thecorresponding ink supply tube 35. When the ink cartridge 23 is correctlyhoused in the housing chamber 39, the ink supply needle 41 is insertedinto the above described ink discharge port 32 a of the ink cartridge 23so that the inside of the ink pack 32 communicates with the inside ofthe ink supply tube 35.

The air introduction tube 42 has flexibility, and is connected to theabove described air supply tube, which extends from the pressure pump.When the ink cartridge 23 is correctly housed in the housing chamber 39,the above described communication hole of the ink case 31 abuts thedownstream end of the air introduction tube 42 so that the gap 33 of theink cartridge 23 communicates with the inside of the air introductiontube 42. A seal member 42 a is provided at the downstream end of the airintroduction tube 42, and by this seal member 42 a, air tightness at theconnecting portion of the air introduction tube 42 and the ink cartridge23 is secured.

As shown in FIG. 4, a connecting member 43 as shown in FIG. 5 isdisposed at the innermost part of the housing chamber 39. The connectingmember 43 includes a slide member 44 and a latch claw member 45 formingfixing means.

As shown in FIG. 6, the slide member 44 includes a body part 47 and alock claw member 49 as a rotating member. The body part 47 includes acasing part 51 as liquid absorbing means, a cylindrical part 53 asbending restraining means, and a latch groove part 55. The casing part51 is the right side part of the slide member 44 in FIG. 6, and has acavity therein. A needle through-hole 51 a, which penetrates through thecasing part 51 along the arrow L direction, is formed in the casing part51. The above described ink supply needle 41 is movably inserted intothe needle through-hole 51 a. An absorbing material (not shown)constituted of Belleater or the like is housed in the casing part 51 tosurround the needle through-hole 51 a, and the absorbing materialabsorbs and retains ink leakage from the ink supply needle 41.

The cylindrical part 53 is the left side part of the slide member 44 inFIG. 6, and has a cylindrical shape. As shown in FIG. 4, the airintroduction tube 42 projecting from the wall surface 39 a of the abovedescribed housing chamber 39 is movably inserted through the cylindricalpart 53. The air introduction tube 42 is guided along the arrow Ldirection by being inserted into the cylindrical part 53, and isprevented from bending. One end of a first coil spring 53 a formingbiasing means abuts the cylindrical part 53 as shown in FIG. 4. Theother end of the first coil spring 53 a abuts the wall surface 39 a ofthe above described housing chamber 39. The first coil spring 53 abiases the cylindrical part 53 in the direction of separation from thewall surface 39 a.

The latch groove part 55 is a part of the slide member 44, which isbetween the casing part 51 and the cylindrical part 53, and a latchgroove 55 a forming fixing means is formed on the top surface of thelatch groove part 55. As shown in FIG. 7, the latch groove 55 a includesnine linear groove portions that are first to ninth grooves 61 to 69. Inthis embodiment, the first groove 61 corresponds to a first grooveportion, the fifth groove 65 corresponds to a second groove portion, thesecond to fourth grooves 62 to 64 correspond to a third groove portion,and the sixth to ninth grooves 66 to 69 correspond to a fourth grooveportion.

The first groove 61 extends diagonally with respect to the arrow Ldirection. The terminal end of the first groove 61 is located nearer tothe casing part 51 than the starting end of the first groove 61 (rightside in FIG. 7) and at the front side (lower side in FIG. 7).

The second groove 62 extends along the arrow L direction. The startingend of the second groove 62 connects to the terminal end of the firstgroove 61. The terminal end of the second groove 62 is located at thefront side (lower side in FIG. 7) from the starting end of the secondgroove 62.

The third groove 63 extends perpendicularly to the arrow L direction.The starting end of the third groove 63 connects to the terminal end ofthe second groove 62. The terminal end of the third groove 63 is locatednearer to the cylindrical part 53 (left side in FIG. 7) than thestarting end of the third groove 63.

The fourth groove 64 extends along the arrow L direction. The startingend of the fourth groove 64 connects to the terminal end of the thirdgroove 63. The terminal end of the fourth groove 64 is located at theback side (upper side in FIG. 7) from the starting end of the fourthgroove 64.

The fifth groove 65 extends perpendicularly to the arrow L direction.The starting end of the fifth groove 65 connects to the terminal end ofthe fourth groove 64. The terminal end of the fifth groove 65 is locatednearer to (left side in FIG. 7) the cylindrical part 53 than thestarting end of the fifth groove 65.

The sixth groove 66 extends along the arrow L direction. The startingend of the sixth groove 66 connects to the terminal end of the fifthgroove 65. The terminal end of the sixth groove 66 is located at thefront side (lower side in FIG. 7) from the starting end of the sixthgroove 66.

The seventh groove 67 extends perpendicularly to the arrow L direction.The starting end of the seventh groove 67 connects to the terminal endof the sixth groove 66. The terminal end of the seventh groove 67 islocated nearer to (left side in FIG. 7) the cylindrical part 53 from thestarting end of the seventh groove 67.

The eighth groove 68 extends along the arrow L direction. The startingend of the eighth groove 68 connects to the terminal end of the seventhgroove 67. The terminal end of the eighth groove 68 is located at theback side (upper side in FIG. 7) from the starting end of the eighthgroove 68.

The ninth groove 69 extends diagonally with respect to the arrow Ldirection. The starting end of the ninth groove 69 connects to theterminal end of the eighth groove 68. The terminal end of the ninthgroove 69 is located nearer to the casing part 51 (right side in FIG. 7)than the starting end of the ninth groove 69 and at the back side (upperside in FIG. 7), and connects to the starting end of the first groove61.

The widths of the first to ninth grooves 61 to 69 are substantially thesame as each other. The depths of the first to eighth grooves 61 to 68are substantially the same as each other. As for the depth of the ninthgroove 69, the depth of the ninth groove 69 at the starting end issubstantially the same as the depths of the first to eighth grooves 61to 68, and the depth of the ninth groove 69 becomes gradually shallowertoward the terminal end from the starting end. Accordingly, a step 71 isformed in a border of the starting end of the first groove 61 and theterminal end of the ninth groove 69.

As shown in FIG. 6, two slide grooves 73 and 75 are provided at theundersurface of the body part 47 of the slide member 44. The slidegrooves 73 and 75 extend along the arrow L direction. As shown in FIG.4, the engaging pieces 40 b and 40 c of the above described rail member40 are engaged with the slide grooves 73 and 75. As a result, the slidemember 44 is slidable along the arrow L direction.

As shown in FIG. 6, the body part 47 includes a rod member 76, whichprojects in the arrow L direction. As shown in FIG. 4, a second coilspring 77 forming biasing means is fitted over the rod member 76. Oneend of the second coil spring 77 abuts the body part 47, and the otherend of the second coil spring 77 abuts the wall surface 39 a at theinnermost part of the housing chamber 39. The body part 47 is biased toseparate from the wall surface 39 a of the housing chamber 39 (see FIG.4) by the second coil spring 77.

As shown in FIG. 6, a recessed portion 78, which is at a locationsandwiched by the above described slide grooves 73 and 75, is providedat the undersurface of the body part 47. Further, as shown in FIG. 8, inthe body part 47, a columnar portion 79 is formed to project downwardfrom the undersurface of the above described latch groove part 55. Theupper end of a third coil spring 81 is fitted over the columnar portion79.

The lock claw member 49 has a shape which is made by bending a planarmember a plurality of times, and includes a support shaft 83 formedintegrally at its center. The lock claw member 49 is located in theabove described recessed portion 78, and the support shaft 83 of thelock claw member 49 has both ends rotatably mounted to the body part 47.Accordingly, the lock claw member 49 is capable of normal rotation,which is the rotation along the arrow R direction shown in FIG. 8 aroundthe support shaft 83, and reverse rotation, which is rotation along thereverse direction to the arrow R direction.

The lock claw member 49 includes one side portion 85 near to the inkcartridge 23 and the other side portion 87 near to the wall surface 39 a(see FIG. 4) which are located with the support shaft 83 therebetween.The one side portion 85 has a sectional shape along the arrow Ldirection substantially formed in the shape of the Japanese letter “

” (substantially U-shaped) and opening upward. The other side portion 87has the sectional shape along the arrow L direction substantially formedin a V-shape open toward the lower side. The top surface of the otherside portion 87 abuts the lower end of the above described third coilspring 81. Therefore, the lock claw member 49 is biased to rotate in thereverse rotation direction by the third coil spring 81.

An engaging recessed portion 23 a as an engaging portion is formed atthe undersurface of a part of the ink cartridge 23, which is located atthe innermost part of the housing chamber 39 when the ink cartridge 23is housed in the housing chamber 39. When the one side portion 85 of thelock claw member 49 is engaged in the engaging recessed portion 23 a,movement of the ink cartridge 23 in the arrow L direction is restrained.

As shown in FIG. 5, the latch claw member 45 is formed into a plateshape substantially in the shape of the Japanese letter “

” (substantially U-shaped). A cylindrical shaft portion 89 projectingdownward is formed at one end of the latch claw member 45. Thecylindrical shaft portion 89 is rotatably fitted into a fitting hole(not shown) provided in the above described housing chamber 39 (see FIG.4). Accordingly, the latch claw member 45 is mounted at the abovedescribed housing chamber 39 so as to be capable of normal rotation,which is the rotation in the arrow r direction with the cylindricalshaft portion 89 as the center of rotation and reverse rotation, whichis rotation in the reverse direction to the arrow r direction.

As shown in FIG. 8, a columnar claw member 91 projecting downward isprovided at the other end of the latch claw member 45. The claw member91 engages in the latch groove 55 a of the above described slide member44, and is movable in the latch groove 55 a. The claw member 91 moveswithin the range of the latch groove 55 a, and thereby, the position ofthe above described slide member 44 in the arrow L direction isdetermined.

More specifically, when the claw member 91 engages in the latch groove55 a at the starting end of the first groove 61, namely, in the engagingposition A shown in FIG. 7, the slide member 44 is located to separatefrom the wall surface 39 a of the housing chamber 39 as shown in FIG. 8and FIG. 9. In this embodiment, the position of the slide member 44 atthis time shall be called an extraction allowing position as a firstposition (first slide position).

When the claw member 91 engages in the latch groove 55 a at the terminalend of the fifth groove 65, namely, the engaging position E shown inFIG. 7 on the other hand, the slide member 44 is located close to thewall surface 39 a of the housing chamber 39 as shown in FIG. 10 and FIG.11. In this embodiment, the position of the slide member 44 at this timeshall be called a mounting position as a second position (second slideposition).

As shown in FIG. 4, one end of a fourth coil spring 93 is fixed to thelatch claw member 45. The other end of the fourth coil spring 93 isfixed to the left side surface 39 b of the above described housingchamber 39. Accordingly, the latch claw member 45 is biased to rotate inthe normal rotation direction by the fourth coil spring 93.

As shown in FIG. 8, a rib 95 is provided to project upward from thebottom surface of the above described housing chamber 39 (see FIG. 4).As shown in FIG. 8, when the slide member 44 is located at theextraction allowing position, the rib 95 abuts an end portion at theside of the wall surface 39 a (see FIG. 4) of the other side portion 87of the above described lock claw member 49. Accordingly, when the slidemember 44 is located at the extraction allowing position, the lock clawmember 49 is displaced in the reverse rotation direction, and the oneside portion 85 of the lock claw member 49 is located at a lowerposition. In this state, the one side portion 85 of the lock claw member49 is located at the position where it is incapable of engaging in theengaging recessed portion 23 a of the above described ink cartridge 23.The position of the lock claw member 49 at this time corresponds to thefirst rotation position.

When the slide member 44 is located at the mounting position as shown inFIG. 10, the rib 95 abuts the portion near to the above describedsupport shaft 83 in the other side portion 87. Accordingly, when theslide member 44 is located at the mounting position, the lock clawmember 49 is displaced in the normal rotation direction, and the oneside portion of the lock claw member 49 is located at an upper position.In this state, the one side portion 85 of the lock claw member 49 islocated at the position where it is engageable in the engaging recessedportion 23 a of the above described ink cartridge 23. The position ofthe lock claw member 49 at this time corresponds to the second rotationposition.

Next, concerning the ink jet recording apparatus 11 constructed asabove, operation when the ink cartridge 23 is attached and detached willbe explained.

In the state in which the ink cartridge 23 is not housed in the housingchamber 39 of the ink jet recording apparatus 11, the slide member 44 islocated at the extraction allowing position as shown in FIG. 8 and FIG.9. In this state, the user slides a new ink cartridge 23 into thehousing chamber 39 of the cartridge holder 12 a along the arrow Ldirection, and thereby, the ink cartridge 23 abuts the slide member 44.At this time, the one side portion 85 of the lock claw member 49 islocated at the lower position, and the one side portion 85 of the lockclaw member 49 is in the state incapable of engaging in the engagingrecessed portion 23 a of the ink cartridge 23.

When the user further presses the ink cartridge 23 in the arrow Ldirection, the slide member 44 is moved in the arrow L direction againstthe biasing force of the first coil spring 53 a and the second coilspring 77. Then, the claw member 91 of the latch claw member 45 movesalong the first groove 61 and the second groove 62 of the latch groove55 a to be located at the terminal end of the second groove 62, namely,the engaging position B, as shown in FIG. 7.

When the claw member 91 is located at the engaging position B, the latchclaw member 45 is normally rotated by the biasing force of the fourthcoil spring 93, and the claw member 91 moves along the third groove 63of the latch groove 55 a. As a result, the latch claw member 45 islocated at the terminal end of the third groove 63, namely, the engagingposition C.

When the user stops pressing the ink cartridge 23 in this state, theslide member 44 is moved in the direction of separation from the wallsurface 39 a (see FIG. 4) by the biasing force of the second coil spring77 and the fourth coil spring 93. As a result, the latch claw member 45moves along the fourth groove 64, and is located at the terminal end ofthe fourth groove 64, namely, the engaging position D. Then, the latchclaw member 45 is normally rotated by the biasing force of the fourthcoil spring 93, and the claw member 91 moves along the fifth groove 65of the latch groove 55 a. As a result, the claw member 91 is located atthe terminal end of the fifth groove 65, namely, the engaging positionE.

When the claw member 91 is located at the engaging position E, theposition of the slide member 44 is located at the mounting position asshown in FIG. 10 and FIG. 11. Accordingly, the lock claw member 49 isdisplaced in the normal rotation direction, and is in the state in whichit is engaged in the engaging recessed portion 23 a of the ink cartridge23. As a result, the movement of the ink cartridge 23 in the arrow Ldirection is restrained by strong engagement between the lock clawmember 49 and the engaging recessed portion 23 a.

Namely, when the ink cartridge 23 is housed in the cartridge holder 12a, the user only has to stop pressing after sliding the ink cartridge 23into the housing chamber 39 and pressing it to the back once. By doingso, the ink cartridge 23 is easily housed in the cartridge holder 12 a.In the state in which the ink cartridge 23 is housed in the housingchamber 39, the movement of the ink cartridge 23 in the arrow Ldirection is restrained by engagement between the lock claw member 49and the engaging recessed portion 23 a. Therefore, even if vibration anddrop occur to the ink jet recording apparatus 11, ink leakage and airleakage hardly occur.

As described above, the air introduction tube 42 (see FIG. 4) issupported by the cylindrical part 53 of the slide member 44 in the statein which bending is prevented. Accordingly, when the ink cartridge 23 ishoused in the cartridge holder 12 a, the air introduction tube 42 (seeFIG. 4) and the communication hole of the ink cartridge 23 can beconnected with high accuracy.

When the ink cartridge 23 housed in the housing chamber 39 is removed,the user presses the ink cartridge 23 in the arrow L direction. Then,the slide member 44 moves in the arrow L direction against the biasingforces of the first coil spring 53 a and the second coil spring 77.Then, the claw member 91 of the latch claw member 45 moves along thesixth groove 66 of the latch groove 55 a as shown in FIG. 7, and islocated at the terminal end of the sixth groove 66, namely, the engagingposition F.

When the claw member 91 is located at the engaging position F, the latchclaw member 45 is normally rotated by the biasing force of the fourthcoil spring 93, and the claw member 91 moves along the seventh groove 67of the latch groove 55 a. As a result, the latch claw member 45 islocated at the terminal end of the seventh groove 67, namely, theengaging position G.

When the user stops pressing the ink cartridge 23 in this state, theslide member 44 is moved in the direction of separation from the wallsurface 39 a (see FIG. 4) by the biasing forces of the second coilspring 77 and the fourth coil spring 93. As a result, the latch clawmember 45 moves along the eighth and ninth grooves 68 and 69, and movesto the terminal end of the ninth groove 69. Then, the latch claw member45 passes over the step 71 and drops, and is located at the starting endof the first groove 61, namely, the engaging position A.

As a result, the slide member 44 is located at the extraction allowingposition as shown in FIG. 8 and FIG. 9. Accordingly, the lock clawmember 49 is displaced in the reverse rotation direction, and is broughtinto the state in which it is not engaged in the engaging recessedportion 23 a of the cartridge 23. In this state, the user need onlygrasp the ink cartridge 23 and slightly pull it, and thereby, the usercan easily extract the cartridge 23 from the cartridge holder 12 a.

The first embodiment has the following advantages.

(1) In the above described embodiment, the slide member 44 is displacedto the mounting position from the extraction allowing position byinserting the ink cartridge 23 into the housing chamber 39 of thecartridge holder 12 a and pressing the slide member 44. As a result, theink cartridge 23 is switched into the state in which it is fixed to beincapable of being extracted from the state in which it is easilyextractable from the housing chamber 39. By moving the ink cartridge 23in the extracting direction from the housing chamber 39, the position ofthe slide member 44 is displaced to the extraction allowing positionfrom the mounting position. As a result, the ink cartridge 23 isswitched into the state in which it is easily extractable from the statein which it is fixed to be incapable of being extracted from the housingchamber 39.

Accordingly, when the slide member 44 is located at the extractionallowing position, the user can attach and detach the ink cartridge 23with small force by extracting and inserting the ink cartridge 23 fromand into the housing chamber 39. When the slide member 44 is located atthe mounting position, the movement of the ink cartridge 23 in the arrowL direction is strongly restrained by engagement of the lock claw member49 and the engaging recessed portion 23 a. Accordingly, ink iseffectively prevented from leaking out of the connecting portions of theink cartridge 23 and the ink supply needle 41 due to vibration, drop andthe like in the ink jet recording apparatus 11.

(2) In the above described embodiment, the slide member 44 is biased inthe direction of separation from the wall surface 39 a of the housingchamber 39 by the first coil spring 53 a and the second coil spring 77.The slide member 44 is fixed at the mounting position by engagement ofthe latch groove 55 a and the latch claw member 45.

Accordingly, when the slide member 44 is moved to the mounting positionfrom the extraction allowing position, it is suitable to slide the slidemember 44 against the biasing forces of the first and second coilsprings 53 a and 77 and locate the slide member 44 at the mountingposition. The slide member 44 when located at the mounting position iskept at the mounting position by the latch groove 55 a and the latchclaw member 45. On the other hand, when the slide member 44 is moved tothe extraction allowing position from the mounting position, the slidemember 44 naturally moves to the extraction allowing position by thebiasing forces of the first and second coil springs 53 a and 77 byreleasing engagement of the latch groove 55 a and the latch claw member45.

Namely, when the slide member 44 is displaced to the extraction allowingposition or the mounting position, the slide member 44 only has to bepressed in the insertion direction of the ink cartridge 23. Accordingly,switching of the position of the slide member 44 is extremely easy.

(3) In the above described embodiment, the slide member 44 is providedwith the latch groove 55 a, and the position of the slide member 44 isdetermined by the engagement position of the latch groove 55 a and theclaw member 91 of the latch claw member 45. Accordingly, movementaccuracy of the slide member 44 is enhanced, and movement of the slidemember 44 is stabilized.

(4) In the above described embodiment, when the slide member 44 islocated at the mounting position, the claw member 91 is located at theengaging position E of the latch groove 55 a. When the claw member 91 islocated at the engaging position E, the slide member 44 is moved in theinsertion direction of the ink cartridge 23, and thereby, the clawmember is moved to the engaging position A where the slide member 44 islocated at the extraction allowing position from the engaging positionE.

Accordingly, in order to displace the position of the slide member 44between the extraction allowing position and the mounting position, theslide member 44 only has to be pressed in the insertion direction of theink cartridge 23. Accordingly, switching of the position of the slidemember 44 is extremely easy.

(5) In the above described embodiment, the ink cartridge 23 is providedwith the engaging recessed portion 23 a, and this engaging recessedportion 23 a is engaged with the lock claw member 49, whereby the inkcartridge 23 is fixed at the mounting position. Accordingly, with justthe minimal design change of only providing the engaging recessedportion 23 a, the specification for the existing ink cartridge can bechanged to a specification that is engageable with the lock claw member49.

(6) In the above described embodiment, the slide member 44 is providedwith the casing part 51 having the needle through-hole 51 a, and anabsorbing material is housed inside the casing part 51. Accordingly, inkleakage out of the ink supply needle 41 when the ink cartridge 23 isextracted from the housing chamber 39 is absorbed by the absorbingmaterial inside the casing part 51. Accordingly, the inside of thehousing chamber 39 is kept clean.

(7) In the above described embodiment, the slide member 44 is providedwith the cylindrical part 53, and by the cylindrical part 53, andbending of the air introduction tube 42 is prevented. Accordingly, whenthe ink cartridge 23 is housed in the housing chamber 39, the airintroduction tube 42 is positioned by the cylindrical part 53 integratedwith the slide member 44 with the movement of the slide member 44.Accordingly, connection accuracy of the communication hole of the inkcartridge 23 and the air introduction tube 42 is enhanced.

The above described embodiment may be changed as follows.

In the above described embodiment, the first and second coil springs 53a and 77 are used as biasing means, but only any one of the first andsecond coil springs 53 a and 77 may be used. Alternatively, three ormore coil springs may be used, or both of the first and second coilsprings 53 a and 77 may be omitted. However, when both of the first andsecond coil springs 53 a and 77 are omitted, the user needs to grasp theink cartridge 23 with fingers or the like and extract it. The biasingmeans may not be a coil spring, but may be an elastic member such asrubber.

In the above described embodiment, the fixing means for keeping theslide member 44 in the mounting position is formed by the latch groove55 a and the latch claw member 45. This fixing means may be changed tothe other fixing means only if it retains the slide member 44 in themounting position and is switchable to allow movement to the extractionallowing position from the mounting position in accordance withnecessity.

In the above described embodiment, the ink cartridge 23 is provided withthe engaging recessed portion 23 a as the engaging portion, and theshape of the lock claw member 49 is in a shape engageable with thisengaging recessed portion 23 a. However, the shapes for the engagingportion of the ink cartridge 23 and the lock claw member 49 may becorrespond to other shapes only if the ink cartridge 23 and the lockclaw member 49 are disengaged and engaged with each other when the slidemember 44 is located at the extraction allowing position and themounting position.

The casing part 51 of the slide member 44 may be omitted.

The cylindrical part 53 of the slide member 44 may be omitted.

In the above described embodiment, the ink cartridge 23 as the liquidcartridge is formed by the ink pack 32 as the liquid housing portion,and the ink case 31 as the liquid case, but the liquid housing portionand the liquid case are not limited to this. For example, the liquidhousing portion and a gap may be formed by partitioning the inside ofthe ink case 31 by a film or the like.

In the above described embodiment, the ink jet recording apparatus 11transfers the ink inside the ink pack 32 into the recording head 20 byintroducing air into the gap 33 between the ink pack 32 and the ink case31. Instead of this, the position of the ink pack 32 is located abovethe recording head 20, and thereby, the ink inside the ink pack 32 maybe transferred to the recording head 20 by gravity. In this case, it isnot necessary to provide the cylindrical part 53 at the slide member 44.

The present invention may be embodied in an ink jet recording apparatusother than the recording apparatus 11 in FIG. 1, for example, inprinting apparatuses such as a fax and a copier. Alternatively, thepresent invention may be embodied in a liquid ejection apparatus whichejects liquid other than ink. The liquid ejection apparatus, whichejects liquid other than ink, may be a liquid ejection apparatus thatejects liquid, such as an electrode material and a coloring material,which are used for manufacturing a liquid crystal display, an EL displayand a surface emitting display, a liquid ejection apparatus for ejectingbiological organic matter used for manufacturing biochips, or a specimenejection apparatus as a precision pipette.

A second embodiment of the present invention will be explained withreference to FIG. 12 to FIG. 23 hereinafter.

A liquid ejection apparatus according to this embodiment is an ink jetrecording apparatus 111 (printer 111) shown in FIG. 12. As shown in FIG.12, the recording apparatus 111 is housed in a body case 112. The bodycase 112 is a casing in a substantially rectangular parallelepipedshape, and a cartridge holder 113 is provided on a top surface of thebody case 112.

A guide shaft 114, a carriage 115, a recording head 116 as a liquidejection head and a valve unit 117, which are shown in FIG. 13, and anink cartridge 118 as a liquid cartridge and a pressure pump 119, whichare shown in FIG. 12, are disposed in the body case 112.

As shown in FIG. 13, the guide shaft 114 is formed into a rod-shape, andis laid between frames 112 a in the body case 112. The carriage 115 isdriven by and connected to a carriage motor (not shown) supported at thebody case 112 via a timing belt (not shown). The carriage 115 issupported on the guide shaft 114 so as to reciprocally move on the guideshaft 114 along an axial direction of the guide shaft 114, following thedrive of the carriage motor. Hereinafter, the movement direction of thecarriage 115, namely, the axial direction of the guide shaft 114 is alsocalled a main scanning direction.

The recording head 116 is provided at an undersurface of the carriage115, and includes a plurality of nozzles (not shown), which eject ink asliquid. The valve unit 117, which is loaded on the carriage 115,temporarily stores ink taken in from the ink cartridge 118, and adjuststhe stored ink at predetermined pressure and supplies the ink to therecording head 116.

The number of valve units 117 included by the recording apparatus 111shown in FIG. 12 is three, and each valve unit 117 can adjust two kindsof ink at predetermined pressure and supply them individually to therecording head 116. Each of three valve units 117 is assigned with twoof six kinds of ink: black, yellow, magenta, cyan, light magenta andlight cyan.

A recording medium T as a target is fed out below the recording head 116along a direction (auxiliary scanning direction) perpendicular to themain scanning direction by feeding means (not shown). The recordingmedium T that is fed out is supported by a platen (not shown) providedbetween the frames 112 a.

As shown in FIG. 12, the number of ink cartridges 118 included by therecording apparatus 111 is six, and each ink cartridge 118 stores one ofsix kinds of ink: black, yellow, magenta, cyan, light magenta and lightcyan. The ink cartridge 118 is detachably attached to the abovedescribed cartridge holder 113. As shown in FIG. 14, the ink cartridge118 includes an ink case 120 as a liquid case and an ink pack 121 as aliquid housing part. The ink cartridge 118 shown in FIG. 14 is one ofsix ink cartridges 118, and the remaining five ink cartridges 118 havethe same structures. The ink case 120 is formed of resin into asubstantially rectangular parallelepiped shape. The ink pack 121 isformed by overlaying two flexible sheets on each other. Ink is sealedinside the ink pack 121.

The ink pack 121 includes an ink discharge port 121 a. A part of the inkdischarge port 121 a is exposed to the outside of the ink case 120, andthe other part of the ink pack 121 is housed inside the ink case 120 inan airtight state. In the ink case 120, a gap 122 is provided betweenthe ink case 120 and the ink pack 121.

The ink case 120 is provided with a communication hole, not shown, whichallows the outside of the ink case 120 and the gap 122 to communicatewith each other. When air is taken into the gap 122 via thiscommunication hole, the ink pack 121 is crushed and ink inside the inkpack 121 is discharged through the ink discharge port 121 a. The inkdischarge port 121 a is connected to the above described valve unit 117via an ink supply tube 123 shown in FIG. 13 as a liquid passage that isprovided to correspond to each of the ink cartridges 118. The inkdischarged from the ink pack 121 is supplied to the valve unit 117 viathe ink supply tube 123.

As shown in FIG. 19 and FIG. 20, a groove 163 having both end portions,which are opened at one side of the ink case 120, is formed on an uppersurface 120 a of the ink case 120. The groove 163 includes three lineargroove portions, which are a first guide groove 166, a second guidegroove 167 and a third guide groove 168 as shown in FIG. 21. A portionof the upper surface 120 a of the ink case 120 surrounded by the groove163 constructs a locking portion 164.

As shown in FIG. 12, the pressure pump 119 is fixed to a rear part ofthe body case 112. The pressure pump 119 is connected to the abovedescribed communication hole of each of the ink cartridges 118 via anair supply tube, not shown. The pressure pump 119 sucks atmospheric air,pressurizes the sucked air, and introduces the air into the abovedescribed gap 122 of the ink cartridge 118 via an air supply tube.

The ink inside the ink pack 121 of the ink cartridge 118 is supplied tothe valve unit 117 and as a result the ink pack 121 is crushed by thepressurized air supplied from the pressure pump 119. The ink supplied tothe valve unit 117 is adjusted to predetermined pressure and thensupplied to the recording head 116, and ejected toward the recordingmedium T, which is fed from the above described feeding means. When theink is ejected from the recording head 116, the recording apparatus 111moves the carriage 115 along the main scanning direction and at the sametime, moves the recording medium T along the direction (auxiliaryscanning direction) perpendicular to the main scanning direction, basedon the data (image data) concerning printing to be performed on therecording medium T.

Next, the above described cartridge holder 113 will be explained indetail.

As shown in FIG. 12, the cartridge holder 113 is disposed above thecarriage 115. The cartridge holder 113 includes six housing chambers 124capable of housing the ink cartridges 118 placed in a horizontal state.As shown in FIG. 15, each of the housing chambers 124 is defined by abottom surface 124 a, and three side surfaces 124 b, 124 c and 124 d.When the ink cartridge 118 is housed in the housing chamber 124, the inkcartridge 118 is slid in the direction shown by the arrow Y in FIG. 15.Namely, the direction of the arrow Y is the insertion direction in whichthe ink cartridge is inserted into the cartridge holder 113 when the inkcartridge 118 is attached to the cartridge holder 113. The movement inthe X-axis direction (see FIG. 15) of the ink cartridge 118 at the timeof sliding is restrained by the side surface 124 c and the side surface124 d of the housing chamber 124.

As shown in FIG. 15, a rail member 125 is provided in the vicinity ofthe center of the bottom surface 124 a of the housing chamber 124. Therail member 125 includes a plate part 125 a in a substantiallyrectangular shape, and a pair of engaging pieces 125 b and 125 cprovided at both sides of the plate part 125 a. The plate part 125 a isfixed in the state in which it closely contacts the bottom surface 124 aof the housing chamber 124. The engaging pieces 125 b and 125 c extendalong the Y-axis direction. A gap is provided between the engagingpieces 125 b and 125 c and the bottom surface 124 a of the housingchamber 124.

An ink supply needle 126 as a liquid supply needle and an airintroduction tube 127 as an air lead-in tube protrude from a sidesurface 124 b located at the innermost part of each of the housingchambers 124. The ink supply needle 126 is hollow, and is connected tothe corresponding ink supply tube 123. When the ink cartridge 118 iscorrectly housed in the housing chamber 124, the ink supply needle 126is inserted into the above described ink discharge port 121 a of the inkcartridge 118 so that the inside of the ink pack 121 communicates withthe inside of the ink supply tube 123.

The air introduction tube 127 has flexibility, and is connected to theabove described air supply tube, which extends from the pressure pump119. When the ink cartridge 118 is correctly housed in the housingchamber 124, the above described communication hole of the ink case 120abuts the downstream end of the air introduction tube 127 so that thegap 122 of the ink cartridge 118 communicates with the inside of the airintroduction tube 127. A seal member 127 a is provided at the downstreamend of the air introduction tube 127, and by this seal member 127 a, airtightness in the connecting portion of the air introduction tube 127 andthe ink cartridge 118 is secured.

As shown in FIG. 15, a connecting member 131 as shown in FIG. 16 isdisposed at the innermost part of the housing chamber 124. Theconnecting member 131 includes a slide member 132 and a latch clawmember 133 as a rotating member.

As shown in FIG. 16 and FIG. 17, the slide member 132 includes a casingpart 134 as liquid absorbing means, a cylindrical part 135 as bendingrestraining means, and a latch groove part 136. The casing part 134 isthe right side part of the slide member 132 in FIG. 17, and has a cavitytherein. A needle through-hole 134 a, which penetrates through thecasing part 134 along the Y-axis, is formed in the casing part 134. Theabove described ink supply needle 126 is movably inserted into theneedle through-hole 134 a. An absorbing material (not shown) constitutedof Belleater or the like is housed in the casing part 134 to surroundthe needle through-hole 134 a, and the absorbing material absorbs andretains ink leakage from the ink supply needle 126.

The cylindrical part 135 is the left side part of the slide member 132in FIG. 17, and has a cylindrical shape. As shown in FIG. 15, the airintroduction tube 127 projecting from the side surface 124 b of theabove described housing chamber 124 is movably inserted through thecylindrical part 135. The air introduction tube 127 is guided along theY-axis direction by being inserted into the cylindrical part 135, and isprevented from bending. One end of a first coil spring 137 forming firstbiasing means abuts the cylindrical part 135 as shown in FIG. 15 andFIG. 20. The other end of the first coil spring 137 abuts the sidesurface 124 b of the above described housing chamber 124. The first coilspring 137 biases the cylindrical part 135 in the direction ofseparation from the side surface 124 b.

The latch groove part 136 is a part of the slide member 132, which isbetween the casing part 134 and the cylindrical part 135, and a latchgroove 136 a as a guide groove is formed on the top surface of the latchgroove part 136. As shown in FIG. 18, the latch groove 136 a includesnine linear groove portions that are first to ninth grooves 141 to 149.In this embodiment, the first groove 141 is a first groove portion, thefifth groove 145 is a second groove portion, the second to fourthgrooves 142 to 144 correspond to a third groove portion, and the sixthto ninth grooves 146 to 149 correspond to a fourth groove portion.

The first groove 141 extends diagonally with respect to the Y-axis. Theterminal end of the first groove 141 is located nearer to the casingpart 134 than the starting end of the first groove 141 (right side inFIG. 18) and at a front side (lower side in FIG. 18).

The second groove 142 extends in parallel with the Y-axis. The startingend of the second groove 142 connects to the terminal end of the firstgroove 141. The terminal end of the second groove 142 is located at thefront side from the starting end of the second groove 142 (lower side inFIG. 18).

The third groove 143 extends in parallel with the X-axis. The startingend of the third groove 143 connects to the terminal end of the secondgroove 142. The terminal end of the third groove 143 is located nearerto the cylindrical part 135 (left side in FIG. 18) than the starting endof the third groove 143.

The fourth groove 144 extends in parallel with the Y-axis. The startingend of the fourth groove 144 connects to the terminal end of the thirdgroove 143. The terminal end of the fourth groove 144 is located at theback side (upper side in FIG. 18) from the starting end of the fourthgroove 144.

The fifth groove 145 extends in parallel with the X-axis. The startingend of the fifth groove 145 connects to the terminal end of the fourthgroove 144. The terminal end of the fifth groove 145 is located nearerto (left side in FIG. 18) the cylindrical part 135 than the starting endof the fifth groove 145.

The sixth groove 146 extends in parallel with the Y-axis. The startingend of the sixth groove 146 connects to the terminal end of the fifthgroove 145. The terminal end of the sixth groove 146 is located at thefront side (lower side in FIG. 18) from the starting end of the sixthgroove 146.

The seventh groove 147 extends in parallel with the X-axis. The startingend of the seventh groove 147 connects to the terminal end of the sixthgroove 146. The terminal end of the seventh groove 147 is located nearerto (left side in FIG. 18) the cylindrical part 135 than the starting endof the seventh groove 147.

The eighth groove 148 extends in parallel with the Y-axis. The startingend of the eighth groove 148 connects to the terminal end of the seventhgroove 147. The terminal end of the eighth groove 148 is located at theback side (upper side in FIG. 18) from the starting end of the eighthgroove 148.

The ninth groove 149 extends diagonally with respect to the Y-axis. Thestarting end of the ninth groove 149 connects to the terminal end of theeighth groove 148. The terminal end of the ninth groove 149 is locatednearer to the casing part 134 (right side in FIG. 18) than the startingend of the ninth groove 149 and at the back side (upper side in FIG.18), and connects to the starting end of the first groove 141.

The widths of the first to ninth grooves 141 to 149 are substantiallythe same as each other. The depths of the first to eighth grooves 141 to148 are substantially the same as each other. The depth of the ninthgroove 149 at the starting end is substantially the same as the depthsof the first to eighth grooves, and the depth of the ninth groove 149becomes gradually shallower toward the terminal end from the startingend. Accordingly, a step 150 is formed in a border of the starting endof the first groove 141 and the terminal end of the ninth groove 149.

As shown in FIG. 17, a slide groove 151 extending in parallel with theY-axis is provided at the undersurface of the slide member 132. Theabove described rail member 125 is fitted in the slide groove 151, andboth side surfaces of the slide groove 151 are engaged with the engagingpieces 125 b and 125 c of the above described rail member 125 shown inFIG. 15. As a result, the slide member 132 is slidable along the railmember 125.

As shown in FIG. 17, the slide member 132 includes a rod member 153,which projects in the Y-axis direction. A tip end of the rod member 153is inserted in and supported by the through-hole (not shown) formed inthe side surface 124 b, and is movable along the Y-axis direction. Asshown in FIG. 15, a second coil spring 154 forming first biasing meansis fitted over the rod member 153. One end of the second coil spring 154abuts a slide member 132, and the other end of the second coil spring154 abuts the side surface 124 b at the innermost part of the housingchamber 124. The slide member 132 is biased to separate from the sidesurface 124 b of the housing chamber 124 (see FIG. 15) by the secondcoil spring 154 and the above described first coil spring 137.

The latch claw member 133 includes a first support member 155, as shownin FIG. 16 and FIG. 20, a second support member 156 integrally providedat the first support member 155, and a third support member 157integrally provided at the second support member 156. Each of the firstsupport member 155, the second support member 156 and the third supportmember 157 is formed into a flat shape.

A cylindrical shaft portion 158 projecting in the opposite directionfrom the arrow Z, namely, downward is formed at one end of the firstsupport member 155. This cylindrical shaft portion 158 is rotatablysupported at a bearing member, not shown, provided at the abovedescribed housing chamber 124 as shown in FIG. 20. Accordingly, thelatch claw member 133 is supported by the bearing member, not shown, soas to be able to normally rotate in the arrow direction around theZ-axis with the shaft portion 158 as the center of rotation and to beable to reversely rotate in the opposite direction from the arrowdirection.

As shown in FIG. 19, the second support member 156 formed to extend fromthe tip end portion of the first support member 155 has a first clawmember 159 in a columnar shape at the undersurface of its tip endportion. The first claw member 159 corresponds to a claw member. Thefirst claw member 159 is fitted in the latch groove 136 a of the abovedescribed slide member 132, and moves inside the latch groove 136 a.When the first claw member 159 moves inside the latch groove 136 a, theshaft portion 158 rotates with the movement of the first claw member159, and is capable of moving slightly along the Z-axis direction. As aresult, the first claw member 159 moves inside the latch groove 136 a,and the second claw member 162 is positioned on the groove 163. As shownin FIG. 20, a locking hole 160 is formed in a tip end of the secondsupport member 156 at the side of the side surface 124 c. A third coilspring 161 as second biasing means is laid between the locking hole 160and a hole formed in the side surface 124 c (not shown). The latch clawmember 133 is biased toward the side surface 124 c by the third coilspring 161.

When the slide member 132 is disposed at the position spaced from theside surface 124 b by the first and second coil springs 137 and 154, thefirst claw member 159 of the latch claw member 133 is disposed at aposition A (starting end) as shown in FIG. 18. The position of the slidemember 132 at this time shall be called an extraction allowing positionas a first position (first slide position).

When the slide member 132 moves by being pressed to the back sideagainst the elastic force of the first and second coil springs 137 and154, the first claw member 159 moves in the first groove 141 from thestarting end to the terminal end, and further moves from the startingend of the second groove 142 to the terminal end (position C shown inFIG. 18). The first claw member 159 disposed at position A does not moveinto the ninth groove 149 from position A because the step 150 existsbetween the first groove 141 and the ninth groove 149.

When the first claw member 159 reaches the terminal end (position C) ofthe second groove 142, the latch claw member 133 moves the first clawmember 159 from the starting end to the terminal end (position D) by theelastic force of the third coil spring 161. When the pressing forceapplied to the slide member 132 is released in this state, the slidemember 132 moves in the direction of separation from the side surface124 b by the elastic forces of the first and second coil springs 137 and154. At this time, the first claw member 159 moves to the terminal end(position E) of the fourth groove 144 from position D. When the firstclaw member 159 reaches the terminal end of the fourth groove 144(position E), the latch claw member 133 moves the first claw member 159in the fifth groove 145 from the starting end to the terminal end(position F) by the elastic force of the third coil spring 161.

When the slide member 132 is moved by being pressed to the back sideagainst the elastic forces of the first and second coil springs 137 and154, the first claw member 159 moves from position F to the terminal end(position G) of the sixth groove 146. When the first claw member 159reaches the terminal end (position F) of the sixth groove 146, the latchclaw member 133 moves the first claw member 159 in the seventh groove147 from the starting end to the terminal end (position H) by theelastic force of the third coil spring 161.

When the first claw member 159 reaches position H, and releases thepressing force applied to the slide member 132, the slide member 132moves in the direction of separation from the side surface 124 b by theelastic forces of the first and second coil springs 137 and 154. Namely,the first claw member 159 moves in the eighth groove 148 and the ninthgroove 149 and returns to the starting end (position A) of the firstgroove 141.

Accordingly, when the slide member 132 is operated to be pressed towardthe side surface 124 b twice, the first claw member 159 goes round thelatch groove 136 a and returns to position A. Namely, the first clawmember 159 is guided from position A to position F by the first pressingoperation, and is guided from position F to position A by the secondpressing operation.

The third support member 157, which is formed to extend at a tip endportion of the second support member 156, has the second claw member 162in the columnar shape as an engaging member formed to project at theundersurface of the tip end portion. The second claw member 162 isdesigned to be fitted in the groove 163 formed in the ink case 120 ofthe above described ink cartridge 118. In this embodiment, the groove163, which guides the second claw member 162, is formed to be largerthan the movement route enveloping the part from position H to positionI of the latch groove 136 a in which the first claw member 159 isengaged, in proportion to the distance from the shaft portion 158 of thelatch claw member 133.

Namely, when the ink cartridge 118 is applied and pressed to the slidemember 132 in order to attach the ink cartridge 118 to the cartridgeholder 113, the first claw member 159 moves in the first groove 141 andmoves to position B inside the second groove 142. The second claw member162 moves with the first claw member 159 and displaces in the oppositedirection from the arrow Y direction, and opposes a first guide groove166 of the groove 163 formed in the ink case 120. Accordingly, when thefirst claw member 159 moves from position B to position C in the secondgroove 142, the second claw member 162 is guided to position K in thefirst guide groove 166 as shown in FIG. 21. The position of the slidemember 132 shall be called a mounting position as a second position(second slide position).

When the first claw member 159 moves from position C of the secondgroove 142 to position D of the third groove 143, the second claw member162 is guided from position K to position L in a second guide groove 167as shown in FIG. 21. When the first claw member 159 moves from positionD to position E of the fourth groove 144, the second claw member 162 isguided from position L to position M in the second guide groove 167 asshown in FIG. 21. When the first claw member 159 moves from position Eto position F in the fifth groove 145, the second claw member 162 isguided from position M to position N in the second guide groove 167 asshown in FIG. 21.

At this point in time, the ink cartridge 118 is in the state in which itis attached to the cartridge holder 113. If the ink cartridge 118 is tobe extracted in this state, the ink cartridge 118 cannot be removed fromthe cartridge holder 113 because the first claw member 159 is engagedwith the side surface of the fifth groove 145 and the second claw member162 is engaged with the locking portion 164.

When the slide member 132 is subsequently pressed via the ink cartridge118, the first claw member 159 moves to position F, position G, positionH, position I and position A in this order as described above. At thistime, the second claw member 162 is guided to position N, position O andposition P in this order, and to position Q of a third guide groove 168as described in FIG. 21. As a result, the second claw member 162 isremoved from the locking portion 164, and is extracted from the groove163 formed in the ink case 120. Accordingly, the ink cartridge 118 canbe removed from the cartridge holder 113.

Next, concerning the printer 111 constructed as described above,operation when the ink cartridge 118 is attached and detached will beexplained.

In the state in which the ink cartridge 118 is not mounted in thehousing chamber 124 of the printer 111, the slide member 132 is locatedat the extraction allowing position as shown in FIG. 19 and FIG. 20. Inthis state, the user slides a new ink cartridge 118 into the housingchamber 124 of the cartridge holder 113 in the Y-axis direction, andthereby, the side surface 118 b of the ink cartridge 118 abuts the slidemember 132. At this time, the second claw member 162 is not located atthe upper surface 120 a of the ink cartridge 118, and is in the stateincapable of engaging with the locking portion 164 of the ink cartridge118.

When the user further presses the ink cartridge 118 in the arrow Ydirection, the slide member 132 moves in the arrow Y direction againstthe biasing force of the first coil spring 137 and the second coilspring 154. Then, the first claw member 159 of the latch claw member 133moves along the first groove 141 and the second groove 142 of the latchgroove 136 a and guides the second claw member 162 from position J ofthe groove 163 to position K. The first claw member 159 is located atthe terminal end of the second groove 142, namely, position C. When thefirst claw member 159 moves along the first groove 141 and the secondgroove 142, the ink supply needle 126 penetrates through the needlethrough-hole 134 a provided in the casing part 134 to be inserted intothe ink discharge port 121 a of the ink cartridge 118. The airintroduction tube 127 is supported in the cylindrical part 135 of theslide member 132 in a state in which it is prevented from bending so asto be connected to the communication hole of the ink cartridge 118.Accordingly, accuracy at the time of connection of the communicationhole of the ink cartridge 118 and the air introduction tube 127 can beenhanced.

When the first claw member 159 is located at position C, the latch clawmember 133 rotates in the direction of the arrow around the Z-axis withthe shaft portion 158 as the center of rotation by the biasing force ofthe third coil spring 161, and the first claw member 159 moves along thethird groove 143 of the latch groove 136 a. As a result, the first clawmember 159 is located at the terminal end of the third groove 143,namely, at position D. The first claw member 159 guides the second clawmember 162 to position L.

When the user stops pressing the ink cartridge 118 in this state, theslide member 132 is moved in the direction of separation from the sidesurface 124 b by the biasing force of the first coil spring 137 and thesecond coil spring 154. As a result, the latch claw member 133 movesalong the fourth groove 144, and is located at the terminal end of thefourth groove 144, namely, position E. Then, the latch claw member 133is moved in the direction toward the side surface 124 c by the biasingforce of the third coil spring 161, and therefore, rotates in thedirection of the arrow around the Z-axis with the shaft portion 158 asthe center of rotation, and the first claw member 159 moves along thefifth groove 145 of the latch groove 136 a. As a result, the first clawmember 159 is located at the terminal end of the fifth groove 145,namely, position F. When the first claw member 159 is located atposition F, the slide member 132 is located at the mounting position asshown in FIG. 22 and FIG. 23, and the second claw member 162 is lockedat the locking portion 164. As a result, movement of the ink cartridge118 in the direction along the Y-axis is restrained. Since the secondclaw member 162 moves while being locked at the groove 163, the uppersurface of the locking portion 164 is locked at the third support member157. Therefore, movement of the ink cartridge 118 in the direction alongthe Z-axis is restrained.

Namely, when the ink cartridge 118 is housed in the cartridge holder113, the user only has to stop pressing after sliding the ink cartridge118 into the housing chamber 124 and pressing it to the back once. Bydoing so, the ink cartridge 118 is easily housed in the cartridge holder113. When the ink cartridge 118 is fixed to the cartridge holder 113,the ink cartridge 118 is fixed to the slide member 132 while keeping thestate in which the second claw member 162 is guided into the groove 163on the ink cartridge 118.

When the ink cartridge 118 is housed in the cartridge holder 113, themovement of the ink cartridge 118 in the X-axis direction is restrainedby the side surface 124 c and the side surface 124 d of the housingchamber 124, and further restrained by the second claw member 162 guidedby the latch claw member 133. As a result, the latch claw member 133 islocked at the upper surface 120 a of the ink cartridge 118, and movementin the Z-axis direction of the ink cartridge 118 is also restrained.Therefore, when the ink cartridge 118 is in the state in which it ishoused in the cartridge holder 113, the ink cartridge 118 is fixed in astate in which it is guided into the cartridge holder 113 and does notswing. Therefore, even if vibration and drop occur at the time oftransportation and printing, ink leakage and air leakage hardly occur.

When the ink cartridge 118 housed in the housing chamber 124 is removed,the user presses the ink cartridge 118 in the arrow Y direction. Then,the slide member 132 moves in the arrow Y direction against the biasingforces of the first coil spring 137 and the second coil spring 154.Then, the first claw member 159 of the latch claw member 133 moves alongthe sixth groove 146 of the latch groove 136 a as shown in FIG. 18, andis located at the terminal end of the sixth groove 146, namely, positionG.

When the first claw member 159 is located at position G, the secondsupport member 156 is biased in the direction toward the side surface124 c by the biasing force of the third coil spring 161. Therefore, thelatch claw member 133 rotates in the direction of the arrow around theZ-axis with the shaft portion 158 as the center of rotation, and thesecond claw member 162 moves along the seventh groove 147 of the latchgroove 136 a. As a result, the first claw member 159 is located at theterminal end of the seventh groove 147, namely, position H.

When the user stops pressing the ink cartridge 118 in this state, theslide member 132 is moved in the direction of separation from the sidesurface 124 b by the biasing forces of the first coil spring 137 and thesecond coil spring 154. The latch claw member 133 inversely rotates inthe direction of the arrow around the Z-axis with the shaft portion 158as the center of rotation. As a result, the first claw member 159 movesalong the eighth groove 148 and the ninth groove 149, and moves to theterminal end of the ninth groove 149. Then, the first claw member 159passes over the step 150 and drops, and is located at position A. Thefirst claw member 159 guides the second claw member 162 to position Qfrom position P to locate it above the latch groove 136 a again. Whenthe first claw member 159 moves along the ninth groove 149 from theeighth groove 148, the ink supply needle 126 is extracted from the inkdischarge port 121 a of the ink cartridge 118. At this time, ink leakagefrom the ink supply needle 126 is absorbed by the absorbing materialinside the casing part 134. Accordingly, the inside of the housingchamber 124 is kept clean.

As a result, the slide member 132 is located at the extraction allowingposition as shown in FIG. 19 and FIG. 20. Namely, the second claw member162 is in a state in which it is not locked at the locking portion 164of the ink cartridge 118. Accordingly, the user can easily extract theink cartridge 118 from the cartridge holder 113 by only grasping andslightly pulling the ink cartridge 118.

The second embodiment has the following advantages.

(1) In this embodiment, when the slide member 132 is located at theextraction allowing position, the user can attach and detach the inkcartridge 118 by pressing the ink cartridge 118 in the arrow Ydirection.

When the slide member 132 is located at the mounting position, the inkcartridge 118 is fixed to the cartridge holder 113 by engagement of thelocking portion 164 of the ink cartridge 118 and the second claw member162 of the latch claw member 133. At this time, movement of the inkcartridge 118 in the X-axis direction is restrained by the second clawmember 162 guided by the latch claw member 133 in addition to the sidesurfaces 124 c and 124 d of the housing chamber 124. Since the secondclaw member 162 moves while being locked at the groove 163 in the uppersurface 120 a of the ink cartridge 118, and therefore, the ink cartridge118 is restrained in movement in the direction along the Z-axis by thethird support member 157. Namely, the ink cartridge 118 is fixed to thecartridge holder 113 in a state in which it is guided thereto.Therefore, the ink cartridge 118 does not swing with respect to thecartridge holder 113. Accordingly, ink is effectively prevented fromleaking out of the connecting portions or the like of the ink cartridge118 and the ink supply needle 126 even if vibration and drop occur atthe time of transportation and printing.

(2) In this embodiment, the slide member 132 is biased in the directionof separation from the side surface 124 b of the housing chamber 124 bythe first coil spring 137 and the second coil spring 154. The slidemember 132 is also biased to the side surface 124 c of the housingchamber 124 by the third coil spring 161. In addition, the slide member132 is fixed at the mounting position by engagement of the latch groove136 a and the first claw member 159, and engagement of the groove 163and the second claw member 162.

Accordingly, when the slide member 132 is moved to the mounting positionfrom the extraction allowing position, it is suitable to slide the slidemember 132 against the biasing forces of the first coil spring 137 andthe second coil spring 154 and locate the slide member 132 at themounting position. The slide member 132 when located at the mountingposition is kept at the mounting position by the locking portion 164 andthe second claw member 162. On the other hand, when the slide member 132is moved to the extraction allowing position from the mounting position,the slide member 132 naturally moves to the extraction allowing positionby the biasing force of the biasing means by releasing engagement of thelocking portion 164 and the second claw member 162.

Namely, when the slide member 132 is displaced to the extractionallowing position or the mounting position, the slide member 132 onlyhas to be pressed in the insertion direction of the ink cartridge 118.Accordingly, switching of the position of the slide member 132 isextremely easy.

(3) In this embodiment, the slide member 132 is provided with the latchgroove 136 a, and the slide groove 151 is provided at the undersurfaceof the slide member 132. Therefore, the position of the slide member 132is determined by the engagement of the slide groove 151 and the railmember 125, and the engagement position of the latch groove 136 a andthe first claw member 159 of the latch claw member 133. Accordingly,movement of the slide member 132 is stabilized and movement accuracy ofthe slide member 132 is enhanced.

(4) In this embodiment, when the slide member 132 is located at themounting position, the first claw member 159 guides the second clawmember 162 to position N, and allows the second claw member 162 to belocked at the locking portion 164. In this state, when the slide member132 is moved in the insertion direction of the ink cartridge 118, thesecond claw member 162 is removed from the locking portion 164, and isextracted from the groove 163 formed in the ink case 120. As a result,the ink cartridge 118 is brought into a state in which it can be removedfrom the cartridge holder 113.

Accordingly, in order to change the position of the slide member 132between the extraction allowing position and the mounting position, theslide member 132 only has to be pressed in the insertion direction ofthe ink cartridge 118, namely, in the arrow Y direction. Accordingly,switching of the position of the slide member 132 is extremely easy.

(5) In this embodiment, the groove 163 is provided on the upper surface120 a of the ink cartridge 118. The second claw member 162 is locked atthe locking portion 164 surrounded by the groove 163, whereby the inkcartridge 118 is fixed at the mounting position. Accordingly, with justthe minimal design change of only providing the groove 163, thespecification for the existing ink cartridge can be changed to aspecification that is engageable with the second claw member 162.

(6) In this embodiment, the slide member 132 is provided with the casingpart 134 having the needle through-hole 134 a, and the absorbingmaterial is housed inside of the casing part 134. Accordingly, inkleakage out of the ink supply needle 126 when the ink cartridge 118 isextracted from the housing chamber 124 is absorbed by the absorbingmaterial inside the casing part 134. Accordingly, the inside of thehousing chamber 124 is kept clean.

(7) In this embodiment, the slide member 132 is provided with thecylindrical part 135, and by the cylindrical part 135, bending of theair introduction tube 127 is prevented. Accordingly, when the inkcartridge 118 is housed in the housing chamber 124, the air introductiontube 127 is positioned by the cylindrical part 135 integrated with theslide member 132 with the movement of the slide member 132. Accordingly,connection accuracy of the communication hole of the ink cartridge 118and the air introduction tube 127 is enhanced.

(8) In this embodiment, the latch claw member 133 is constructed by thefirst support member 155, the second support member 156 and the thirdsupport member 157, which are integrally formed. Therefore, a shift dueto assembly does not occur between the first claw member 159 of thesecond support member 156 and the second claw member 162 of the thirdsupport member 157. Therefore, movement of the first claw member 159following rotation of the latch claw member 133 is transmitted to thesecond claw member 162 with high accuracy. Accordingly, positioningaccuracy of the ink cartridge 118 with respect to the slide member 132and the cartridge holder 113 is enhanced. Since the latch claw member133 is constructed by integral formation, the number of components canbe restrained to the minimum.

(9) Both end portions of the groove 163 provided on the upper surface120 a of the ink cartridge 118 extend along the Y-axis direction and areopened at one side of the ink cartridge 118. Therefore, the second clawmember 162 is not disengaged from the groove 163 in the direction otherthan the Y-axis direction.

The second embodiment may be changed as follows.

In the above described embodiment, the groove 163 and the lockingportion 164 may be provided at the side surface and the bottom surfaceof the ink cartridge 118 instead of the upper surface 120 a of the inkcartridge 118. In this case, the first claw member 159 and the secondclaw member 162 may be provided at the latch claw member 133 so as tooppose the groove 163 and the locking portion 164.

In the above described embodiment, a total of three coil springs, whichare the first coil spring 137, the second coil spring 154 and the thirdcoil spring 161, are used as the biasing means, but the number of coilsprings that are used is not limited to this. The biasing means may notbe a coil spring, but may be a plate spring or rubber.

In the above described embodiment, the fixing means for keeping theslide member 132 in the mounting position is formed by the latch groove136 a and the first claw member 159, the second claw member 162 and thelocking portion 164. This fixing means may be changed to the otherfixing means only if it fixes the slide member 132 in the mountingposition and is switchable to allow movement to the extraction allowingposition from the mounting position in accordance with necessity. Forexample, the projected first claw member 159 is formed at the slidemember 132, the projected second claw member 162 is formed on the inkcartridge 118, and the groove 163 fitted on the first claw member, andthe locking portion 164 at which the second claw member 162 is lockedmay be formed on the latch claw member 133.

In the above described embodiment, the shape of the locking portion 164may be changed. For example, a recessed portion which is recessed in thearrow Y direction and a V-shaped groove may be provided at the lockingportion so that when the first claw member 159 is engaged with Fposition, the second claw member 162 is guided to the locking portion164. Alternatively, the projected portion which project in the oppositedirection from the arrow Y direction may be formed. As a result, thefirst claw member 159 is engaged with position F at the same time aswhen the second claw member 162 is locked at the projected portion andthe locking portion 164, and therefore, movement in the direction alongthe X-axis and the Y-axis is restrained.

In the above described embodiment, the slide member 132 includes thecasing part 134 and the cylindrical part 135, but the slide member 132may not include the casing part 134 or/and the cylindrical part 135.

In the above described embodiment, the ink cartridge 118 is formed bythe ink pack 121 as the liquid housing portion, and the ink case 120 asthe liquid case, but the liquid housing portion and the liquid case arenot limited to this. For example, the liquid housing portion and a gapmay be formed by partitioning the inside of the ink case 120 by a filmor the like.

In the above described embodiment, the printer 111 transfers the inkinside the ink pack 121 into the recording head 116 by introducing airinto the gap 122 between the ink case 120 and the ink pack 121 by thepressure pump 119. Instead of this, the position of the ink pack 121 islocated above the recording head 116, and thereby, the ink inside theink pack 121 may be transferred to the recording head 116 by gravity. Inthis case, it is not necessary to provide the cylindrical part 135 atthe slide member 132.

The present invention may be embodied in an ink jet recording apparatusother than the printer 111 in FIG. 12, for example, in printingapparatuses such as a fax and a copier. Alternatively, the presentinvention may be embodied in a liquid ejection apparatus which ejectsliquid other than ink. The liquid ejection apparatus, which ejectsliquid other than ink, may be a liquid ejection apparatus that injectsliquid, such as an electrode material and a coloring material, which areused for manufacturing a liquid crystal display, an EL display and asurface emitting display, a liquid ejection apparatus for ejectingbiological organic matter used for manufacturing biochips, or a specimenejection apparatus as a precision pipette.

1. A liquid ejection apparatus comprising: a cartridge holder; a liquidcartridge detachably mounted on the cartridge holder and storing liquid,the liquid in the liquid cartridge attached to the cartridge holderbeing ejected toward a target; a slide member and a rotating member,wherein: said slide member is slidably supported at said cartridgeholder, the slide member slides along an insertion direction of theliquid cartridge between a first position and a second position, and theinsertion direction is a direction in which the liquid cartridge isinserted into the cartridge holder when the liquid cartridge is attachedto the cartridge holder, and said rotating member is rotatably supportedat said cartridge holder, rotation of the rotating member is linked tosliding of said slide member, and when the slide member moves to thesecond position from the first position, the rotating member displacesso as not to allow removal of the liquid cartridge from the cartridgeholder, and when the slide member moves to the first position from thesecond position, the rotating member displaces to allow removal of theliquid cartridge from the cartridge holder; and a liquid supply needleconnected to said liquid cartridge, wherein the liquid supply needle ismovably inserted through said slide member, and said slide memberincludes liquid absorbing means integrated with the slide member tosurround the liquid supply needle and to absorb liquid leakage.
 2. Aliquid ejection apparatus comprising a liquid ejection head for ejectingliquid toward a target; a liquid cartridge for storing said liquid; aliquid passage for connecting said liquid ejection head and said liquidcartridge; a cartridge holder for housing said liquid cartridge; and aslide member and a rotating member, wherein: said slide member isslidably supported at said cartridge holder, the slide member isslidable along an insertion direction of said liquid cartridge between afirst position and a second position, and the insertion direction is adirection in which the liquid cartridge is inserted into the cartridgeholder when the liquid cartridge is attached to the cartridge holder,and said rotating member is rotatably supported at said cartridgeholder, rotation of the rotating member is linked to sliding of saidslide member, and when said slide member moves to the second positionfrom the first position, the rotating member displaces so as to connectsaid liquid cartridge to said slide member, and when said slide membermoves to the first position from the second position, the rotatingmember displaces to release connection of said liquid cartridge to saidslide member, wherein said liquid passage includes a liquid supplyneedle connected to said liquid cartridge, said liquid supply needle ismovably inserted through said slide member, and said slide memberincludes liquid absorbing means integrated with the slide member tosurround said liquid supply needle and to absorb liquid leakage.
 3. Theliquid ejection apparatus according to claim 2, further comprisingbiasing means for biasing said slide member to said first position fromsaid second position, in which movement of the slide member from thefirst position to the second position is performed against the biasingforce of said biasing means, and wherein said rotating member includesan engaging member which switches between a state in which the engagingmember engages with said liquid cartridge and a state in which theengaging member does not engage with said liquid cartridge in accordancewith rotation of the rotating member.
 4. The liquid ejection apparatusaccording to claim 3, wherein said slide member includes a guide groove,said rotating member includes a claw member movable inside the guidegroove along said guide groove, in which rotation of the rotating memberis linked to movement of the claw member, and said guide groove includesa first groove portion in which said claw member engages when said slidemember is located at said first position, a second groove portion inwhich said claw member engages when said slide member is located at saidsecond position, with movement of said slide member to said firstposition being restrained when said claw member engages in the secondgroove portion, a third groove portion which guides said claw memberfrom said first groove portion to said second groove portion when saidslide member moves from said first position to said second position, anda fourth groove portion which guides said claw member from said secondgroove portion to said first groove portion when said slide member movesfrom said second position to said first position.
 5. The liquid ejectionapparatus according to claim 4, wherein said fourth groove portion isformed to guide said claw member from said second groove portion to saidfirst groove portion when said slide member slides in an insertiondirection of said liquid cartridge from said second position.
 6. Theliquid ejection apparatus according to claim 3, wherein the engagingmember, which is included by said rotating member, engages in a grooveopen at one side of an upper surface of said liquid cartridge, andconnects said liquid cartridge and said slide member.
 7. The liquidejection apparatus according to claim 3, wherein said biasing means isfirst biasing means, the liquid ejection apparatus further comprisessecond biasing means for biasing said rotating member in one direction,and said rotating member rotates against biasing force of said secondbiasing means during movement of the slide member from the firstposition to the second position, and rotates while being biased by saidsecond biasing means during movement of the slide member to the firstposition from the second position.
 8. The liquid ejection apparatusaccording to claim 2, wherein said liquid cartridge includes acommunication hole, said cartridge holder includes an air lead-in tubeconnected to said communication hole of the liquid cartridge housed inthe cartridge holder, and said slide member includes bending restrainingmeans integrated with the slide member to restrain bending of the airlead-in tube.